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  <h1 class="topictitle1">创建NAS文件系统挂载更新策略</h1>
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   <p id="nas_s_0199__zh-cn_topic_0000002200147069_zh-cn_topic_0000001123352147_p629911415014">创建即时挂载时可以为即时挂载关联挂载更新策略，关联后将按照更新策略更新挂载的副本。</p>
   <div class="section" id="nas_s_0199__zh-cn_topic_0000002200147069_section67181941524">
    <h4 class="sectiontitle">操作步骤</h4>
    <ol id="nas_s_0199__zh-cn_topic_0000002200147069_zh-cn_topic_0000001090318017_ol2942173118420">
     <li id="nas_s_0199__zh-cn_topic_0000002200147069_li10796132225712"><span>选择<span class="uicontrol" id="nas_s_0199__zh-cn_topic_0000002200147069_zh-cn_topic_0000002199964685_uicontrol363118811524">“<span id="nas_s_0199__zh-cn_topic_0000002200147069_zh-cn_topic_0000002199964685_text1363188195219">数据利用</span> &gt; <span id="nas_s_0199__zh-cn_topic_0000002200147069_zh-cn_topic_0000002199964685_text1632191017433">数据利用策略</span> &gt; <span id="nas_s_0199__zh-cn_topic_0000002200147069_zh-cn_topic_0000002199964685_text591602852419">挂载更新策略</span>”</span>。</span></li>
     <li id="nas_s_0199__zh-cn_topic_0000002200147069_li883010469286"><span>单击<span class="uicontrol" id="nas_s_0199__zh-cn_topic_0000002200147069_uicontrol6830134610289">“创建”</span>，创建挂载更新策略。</span><p></p><p id="nas_s_0199__zh-cn_topic_0000002200147069_p1932511477282">相关参数说明如<a href="#nas_s_0199__zh-cn_topic_0000002200147069_table1885805992814">表1</a>所示。</p>
      <div class="tablenoborder">
       <a name="nas_s_0199__zh-cn_topic_0000002200147069_table1885805992814"></a><a name="zh-cn_topic_0000002200147069_table1885805992814"></a>
       <table cellpadding="4" cellspacing="0" summary="" id="nas_s_0199__zh-cn_topic_0000002200147069_table1885805992814" frame="border" border="1" rules="all">
        <caption>
         <b>表1 </b>挂载更新策略参数
        </caption>
        <colgroup>
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         <col style="width:67.85%">
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        <thead align="left">
         <tr id="nas_s_0199__zh-cn_topic_0000002200147069_row885895992810">
          <th align="left" class="cellrowborder" valign="top" width="32.15%" id="mcps1.3.2.2.2.2.2.2.3.1.1"><p id="nas_s_0199__zh-cn_topic_0000002200147069_p3858359172817">参数</p></th>
          <th align="left" class="cellrowborder" valign="top" width="67.85%" id="mcps1.3.2.2.2.2.2.2.3.1.2"><p id="nas_s_0199__zh-cn_topic_0000002200147069_p2085815914286">说明</p></th>
         </tr>
        </thead>
        <tbody>
         <tr id="nas_s_0199__zh-cn_topic_0000002200147069_row1285818592286">
          <td class="cellrowborder" valign="top" width="32.15%" headers="mcps1.3.2.2.2.2.2.2.3.1.1 "><p id="nas_s_0199__zh-cn_topic_0000002200147069_p158581596282"><span id="nas_s_0199__zh-cn_topic_0000002200147069_text8516142712455">名称</span></p></td>
          <td class="cellrowborder" valign="top" width="67.85%" headers="mcps1.3.2.2.2.2.2.2.3.1.2 "><p id="nas_s_0199__zh-cn_topic_0000002200147069_p14858195916284">自定义策略名称。</p></td>
         </tr>
         <tr id="nas_s_0199__zh-cn_topic_0000002200147069_row2858185972814">
          <td class="cellrowborder" valign="top" width="32.15%" headers="mcps1.3.2.2.2.2.2.2.3.1.1 "><p id="nas_s_0199__zh-cn_topic_0000002200147069_p13858135911283"><span id="nas_s_0199__zh-cn_topic_0000002200147069_text142181132104811">副本数据</span></p></td>
          <td class="cellrowborder" valign="top" width="67.85%" headers="mcps1.3.2.2.2.2.2.2.3.1.2 "><p id="nas_s_0199__zh-cn_topic_0000002200147069_p148581059192814">选择某个时间段的最新副本进行挂载。如果时间段内没有生成副本，则不更新挂载。</p>
           <ul id="nas_s_0199__zh-cn_topic_0000002200147069_ul121553611533">
            <li id="nas_s_0199__zh-cn_topic_0000002200147069_li676011513562"><span id="nas_s_0199__zh-cn_topic_0000002200147069_text1382910524244">最近一小时</span>：选择最近一个小时的最新副本。<p id="nas_s_0199__zh-cn_topic_0000002200147069_p7510044174917">如：当前是16:30，则选择15:00~16:00生成的最新副本。</p></li>
            <li id="nas_s_0199__zh-cn_topic_0000002200147069_li4974134015316"><span id="nas_s_0199__zh-cn_topic_0000002200147069_text822918464231">最近一天</span>：选择最近一天的最新副本。<p id="nas_s_0199__zh-cn_topic_0000002200147069_p19545195611522">如：当前是1月30日，则选择1月29日生成的最新副本。</p></li>
            <li id="nas_s_0199__zh-cn_topic_0000002200147069_li6990144615531"><span id="nas_s_0199__zh-cn_topic_0000002200147069_text18591115614220">最近一周</span>：选择最近一周的最新副本。<p id="nas_s_0199__zh-cn_topic_0000002200147069_p4313723978">如：当前是2021年的第5个周，则选择2021年第4个周生成的最新副本。</p></li>
            <li id="nas_s_0199__zh-cn_topic_0000002200147069_li138681249205315"><span id="nas_s_0199__zh-cn_topic_0000002200147069_text176871540182112">最近一月</span>：选择最近一月的最新副本。<p id="nas_s_0199__zh-cn_topic_0000002200147069_p7985115311718">如：当前是12月，则选择11月生成的最新副本。</p></li>
            <li id="nas_s_0199__zh-cn_topic_0000002200147069_li16343856121910"><span id="nas_s_0199__zh-cn_topic_0000002200147069_text99148448203">最新的一个副本</span>：选择最新的副本。</li>
           </ul></td>
         </tr>
         <tr id="nas_s_0199__zh-cn_topic_0000002200147069_row14858135922818">
          <td class="cellrowborder" valign="top" width="32.15%" headers="mcps1.3.2.2.2.2.2.2.3.1.1 "><p id="nas_s_0199__zh-cn_topic_0000002200147069_p2858859172814"><span id="nas_s_0199__zh-cn_topic_0000002200147069_text260315392481">调度计划</span></p></td>
          <td class="cellrowborder" valign="top" width="67.85%" headers="mcps1.3.2.2.2.2.2.2.3.1.2 "><p id="nas_s_0199__zh-cn_topic_0000002200147069_p1297531492118">多长时间更新一次挂载副本。</p>
           <ul id="nas_s_0199__zh-cn_topic_0000002200147069_ul129366442212">
            <li id="nas_s_0199__zh-cn_topic_0000002200147069_li149361144220">每xx小时/天/周更新一次挂载副本，并设置首次更新挂载副本的具体时间。<p id="nas_s_0199__zh-cn_topic_0000002200147069_p15763113165913"><a name="nas_s_0199__zh-cn_topic_0000002200147069_li149361144220"></a><a name="zh-cn_topic_0000002200147069_li149361144220"></a>如果设置的时间早于当前时间，按照调度计划执行任务。</p></li>
            <li id="nas_s_0199__zh-cn_topic_0000002200147069_li1642915355220">备份完成后立即更新一次挂载副本。</li>
           </ul></td>
         </tr>
         <tr id="nas_s_0199__zh-cn_topic_0000002200147069_row158587593285">
          <td class="cellrowborder" valign="top" width="32.15%" headers="mcps1.3.2.2.2.2.2.2.3.1.1 "><p id="nas_s_0199__zh-cn_topic_0000002200147069_p14858185919281"><span id="nas_s_0199__zh-cn_topic_0000002200147069_text1329164718484">保留</span></p></td>
          <td class="cellrowborder" valign="top" width="67.85%" headers="mcps1.3.2.2.2.2.2.2.3.1.2 "><p id="nas_s_0199__zh-cn_topic_0000002200147069_p10629310142313">更新挂载后，被卸载的副本的保留时长。</p> <p id="nas_s_0199__zh-cn_topic_0000002200147069_p11637242202712">支持设置为保留xx天/周/月/年、永久保留或保留最新一个副本。</p></td>
         </tr>
        </tbody>
       </table>
      </div> <p></p></li>
     <li id="nas_s_0199__zh-cn_topic_0000002200147069_li212919502345"><span>单击<span class="uicontrol" id="nas_s_0199__zh-cn_topic_0000002200147069_uicontrol36992586342">“确定”</span>。</span></li>
    </ol>
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